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This paper describes a current mode integrator and filter. The circuit can operate at high cutoff frequency and has low input impedance. The design of current mode integrator is based on a low input impedance current mirror with grounded capacitors. The integrator provides a building block for using in active filter circuits based on the doubly terminated LC ladder filter prototype. A 5th order low...
A low-power high-frequency sinusoidal quadrature oscillator is presented through the use of two all-pass current mirror (CM)-based filters, a 1st-order CM low-pass filter and a CM bilinear transfer function. The bilinear transfer function is described in terms of a negative resistance (RN = -RL) where RL is a resistor load of a current mirror. The technique is relatively simple based on (i) inherent...
In this paper, we demonstrate the compensation effect of nonlinear distortion of loudspeaker systems using dynamic distortion measurement. The swept sinusoidal wave is usually used for the verification of the compensation effect of nonlinear distortion. However, the evaluation result is not always corresponding to actual drive status because the input signals to loudspeaker systems have wideband frequency...
We present a subpixel estimation technique for DCT sign phase correlation (DCT-SPC). The DCT-SPC requires only the signs of DCT coefficients and can be used in order to estimate the translation between signals. However, the translation values estimated by DCT-SPC were limited to integer numbers. The proposed technique enables DCT-SPC to estimate translation with subpixel accuracy. Considering the...
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